The APA3002 is a stereo, filter-free Class-D audio amplifier designed by Anpec Electronics. It is specifically tailored for portable applications where high-quality audio reproduction and power efficiency are critical. Its key features include low THD+N, integrated protection circuitry, and minimal external components, making it an excellent choice for mobile devices, portable media players, and other battery-powered systems.

Applications

• Portable Media Players: Provides amplified audio output for MP3 players and other portable media devices.
• Mobile Phones: Integrated into smartphones to deliver enhanced audio performance through the built-in speakers.
• Tablets: Used in tablet devices for clear and loud audio reproduction.
• Laptop Computers: Used to enhance audio quality from built-in speakers in laptops.
• USB Speakers: Powers the audio output for small USB-powered speaker systems.

Features

• Stereo Class-D Amplifier: Offers efficient stereo audio amplification with minimal power consumption.
• Filter-Free Modulation: Eliminates the need for external LC filters, reducing BOM cost and board space.
• Low THD+N: Delivers high-fidelity audio with minimal distortion and noise.
• Integrated Protection: Features over-current, over-temperature, and short-circuit protection.
• Adjustable Gain: Allows for gain adjustment through external resistors.

Benefits

• Extended Battery Life: High efficiency minimizes power consumption, resulting in longer battery life for portable devices.
• Improved Audio Quality: Low THD+N provides clear and accurate audio reproduction.
• Reduced System Cost: Filter-free modulation reduces the number of external components required.
• Enhanced Reliability: Integrated protection circuits safeguard the device from potential damage.
• Simplified Design: Requires minimal external components, simplifying circuit design and layout.

Additional Details

The APA3002 typically operates from a supply voltage of 2.5V to 5.5V. It delivers power output of up to 3W per channel into a 4Ω load with low total harmonic distortion plus noise (THD+N). The shutdown function minimizes the quiescent current during idle periods, contributing to longer battery life. The gain can be configured externally by selecting appropriate feedback resistors. The device is typically available in space-saving packages like QFN.